نمایش ندادن مطالب فراخوانی شده از دیتابیس در لیست ویو

Cursor result = db.rawQuery("SELECT * FROM " + DB_TBL_ASHAR + " WHERE first_category_id= 4", null);

List<HashMap<String , Object>> all_data= new ArrayList<>();

while (result.moveToNext())
{
HashMap<String , Object> temp= new HashMap<>();

temp.put("id", result.getString(0));
temp.put("first_category_id", result.getString(1));
temp.put("poets_id", result.getString(2));
temp.put("poetry", result.getString(3));

all_data.add(temp);
}
retu all_data;
}

MyListView = (ListView) findViewById(R.id.shaerane_bozorg_listview);
db = new DatabaseHandler(getBaseContext());
db.open();

ashar_shaerane_bozorg = db.getShaeraneBozorg();

String[] from= {"poetry", "poets_id"};

int[] to= {R.id.txt_matne_sher, R.id.txt_shaer};

SimpleAdapter adb = new SimpleAdapter(
getBaseContext() , ashar_shaerane_bozorg , R.layout.custom_sher_list , from , to
);

MyListView.setAdapter( adb );
db.close();